The Client Who Is 60% of Your Revenue

You are pulling together your year-end numbers. Three revenue lines, maybe four. You look at the first one and you know, without reaching for a calculator, that it is bigger than all the others put together.

You like that client. They pay on time, they trust you, they send more work without being asked. They are probably the best client you have ever had.

They are also the only one whose exit could have you scrolling job listings.

The comfort that looks like safety

A big client solves several problems at once. Revenue becomes predictable. Business development, the thing most solopreneurs push to next week, stops feeling urgent. You know what you are doing Monday, and you know it for the Monday after that.

That stability is real. It just comes from a single source, and a single source behaves differently than a portfolio.

Finance has a convention for this: once more than 20% to 25% of revenue comes from one customer, you are in concentration risk territory, and lenders and business buyers price that into their valuations. A solopreneur whose top client is 60% of revenue is well past that line. Nobody ever points it out, because nobody else is looking at those numbers.

There is one tell that never lies. Listen to yourself describe your week to someone. If you say "my client" in the singular without specifying which one, because there is no possible ambiguity, the concentration settled in a long time ago.

Three things change without you deciding

Dependence does not arrive as a decision. It arrives as a series of reasonable small adjustments spread over months.

Your prices. You raised rates for new clients two years ago. Not for them. It felt awkward, given the volume. So they pay a two-year-old price for today's work. The subject is worth opening, and there are ways to do it without losing the client.

Your calendar. Their emergencies become yours faster than anyone else's. When two requests land on the same Tuesday, you already know which one moves first, and merit has nothing to do with it.

Your judgment. This one is the quietest. You start letting decisions through that you would have pushed back on with a smaller client. The calculation runs somewhere in the background, and you never say it out loud.

Statistics Canada put numbers on this. Between July and September 2022, roughly 588,000 people were self-employed without employees and depended on a single business relationship. In 427,000 of those cases, the single relationship was a client. In the rest, it was an intermediary: a company handing out subcontracted work, or connecting them to the end clients.

The distinction changes the face of the problem, not its nature. Whether your revenue depends on one client or one work provider, a single decision made elsewhere is enough to stop it. That whole group was also more likely to report having little control over their prices: 45.8%, against 38.1% among self-employed workers with more varied business relationships.

Each of these is defensible on its own. Together, over a couple of years, they turn a commercial relationship into something closer to employment, minus the notice period, the benefits and the legal protections that come with it. That is the part worth noticing early, while you still have room to move.

The day it flips has nothing to do with you

When the relationship ends, the quality of your work is rarely the reason. A reorg. A new director who arrives with her own vendors. A budget pulled in-house. An acquisition. A spending freeze decided three floors above the person you talk to every week.

The notice period is short. Service agreements often end in thirty days, sometimes less. By the time you understand what is happening, you have already burned part of the window you should have been using to get back into prospecting mode.

And it is the worst possible moment to start prospecting. You are searching under pressure, with a bank balance going down and no leverage on price. It is the feast-or-famine cycle, sped up and concentrated into one loss.

There is also a part that is hard to admit. Even knowing the decision came from somewhere else entirely, you will take it personally for a few weeks. That is normal, and it passes faster when the next few months already contain something else.

Shrinking the share without blowing things up

The good news is that none of this requires leaving the big client. The work happens alongside, while the relationship continues.

What "adding" looks like in practice is unglamorous. Two conversations a month with people who are not clients yet. One piece of writing that shows how you think. One old contact you check in with for no particular reason. None of it produces revenue this quarter, and all of it decides whether you have options in eighteen months.

Step three is where it almost always breaks down. Prospecting while things are good means working for revenue that does not exist yet, while paid work sits on the desk. Hating sales does not help, but the main difficulty is elsewhere: that half day has no deadline, so it always yields to something that does.

Vector: seeing concentration before it sees you

A client who takes 60% of your revenue takes 60% of your weeks first. The drift shows up in the calendar well before it shows up in the bank account, provided you look at the calendar with the right eyes.

That is where Arthur, the planner inside Vector, works. He knows your projects, your deadlines and your real workload, and he builds your day plan from that. So you see where your time actually goes, project by project, without reconstructing the week from memory on Friday night.

And the half day for development, the one with no client and no deadline, sits in the plan like everything else. Arthur does the planning work, you keep control over what you decide to protect.